Buddha Ancestor Tang had plotted for ten thousand years just to acquire a freely commandable enforcer. How could he possibly stop just because Destruction had blocked him a few times?
If you had no connection whatsoever to the Tang Sect, then even if Destruction watched Buddha Ancestor every day, there would inevitably be moments when he could not keep watch. Buddha Ancestor could send a strand of divine consciousness down to the lower realm and wipe you out, or send the Titan Giant Ape and Sky Azure Bull Python after you. You would not survive against two Limit Douluo.
During the period of Douluo II, Buddha Ancestor truly covered the sky with one hand on Douluo Continent. I was not being biased in writing him this way.
And then there was the Auspicious Beast. In the original work, even the Golden Dragon Spear was given to her by Buddha Ancestor. How could she possibly transform into whatever form she wanted?
With Buddha Ancestor's schemes at work, she could not decide for herself.
Do not underestimate Buddha Ancestor Tang too much. He was a God King with two God Positions. Other than being unable to descend in his true body, what could he not scheme for?